forked from rosh/MQL5Book
53 lines
2.3 KiB
MQL5
53 lines
2.3 KiB
MQL5
 | //+------------------------------------------------------------------+
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//| ArrayInsert.mq5 |
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//| Copyright 2021, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#define PRTS(A) Print(#A, "=", (string)(A) + " / status:" + (string)GetLastError())
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//+------------------------------------------------------------------+
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//| Script program start function |
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//+------------------------------------------------------------------+
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void OnStart()
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{
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int dynamic[];
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int dynamic2Dx5[][5];
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int dynamic2Dx4[][4];
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int fixed[][4] = {{1, 2, 3, 4}, {5, 6, 7, 8}};
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int insert[] = {10, 11, 12};
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int array[1] = {100};
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// 1D and 2D arrays can't be mixed
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PRTS(ArrayInsert(dynamic, fixed, 0)); // false:4006, ERR_INVALID_ARRAY
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ArrayPrint(dynamic); // empty
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// 2D arrays with different second dimension size can't be mixed
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PRTS(ArrayInsert(dynamic2Dx5, fixed, 0)); // false:4006, ERR_INVALID_ARRAY
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ArrayPrint(dynamic2Dx5); // empty
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// no matter if arrays are both fixed (or dynamic),
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// dimension number and higher sizes must match
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PRTS(ArrayInsert(fixed, insert, 0)); // false:4006, ERR_INVALID_ARRAY
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ArrayPrint(fixed); // doesn't change
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// target index is out of bound (10 > 3), can be 0, 1, 2 for 'insert'
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PRTS(ArrayInsert(insert, array, 10)); // false:5052, ERR_SMALL_ARRAY
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ArrayPrint(insert); // doesn't change
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// successful tests
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// second row from 'fixed' will be copied
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PRTS(ArrayInsert(dynamic2Dx4, fixed, 0, 1, 1)); // true
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ArrayPrint(dynamic2Dx4);
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// both rows of 'fixed' will be added to the end
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PRTS(ArrayInsert(dynamic2Dx4, fixed, 1)); // true
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ArrayPrint(dynamic2Dx4);
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// 'dynamic' will be allocated to get all element of 'insert'
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PRTS(ArrayInsert(dynamic, insert, 0)); // true
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ArrayPrint(dynamic);
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// 'dynamic' array will expand by 1 element
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PRTS(ArrayInsert(dynamic, array, 1)); // true
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ArrayPrint(dynamic);
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// new element will push off the last one from 'insert'
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PRTS(ArrayInsert(insert, array, 1)); // true
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ArrayPrint(insert);
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}
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//+------------------------------------------------------------------+
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